feat: add schema support for orphanedRowAction

Adds support for setting the action for orphaned relation rows when using separate entity definitions

Fixes typeorm#7417

Author: Jamieson Baker

src/entity-schema/EntitySchemaRelationOptions.ts

@@ -98,4 +98,8 @@ export interface EntitySchemaRelationOptions {
      */
     deferrable?: DeferrableType;
 
+    /**
+     * When a child row is removed from its parent, determines if the child row should be orphaned (default) or deleted.
+     */
+    orphanedRowAction?: "nullify" | "delete";
 }

src/entity-schema/EntitySchemaTransformer.ts

@@ -136,7 +136,8 @@ export class EntitySchemaTransformer {
                             onUpdate: relationSchema.onUpdate,
                             deferrable: relationSchema.deferrable,
                             primary: relationSchema.primary,
-                            persistence: relationSchema.persistence
+                            persistence: relationSchema.persistence,
+                            orphanedRowAction: relationSchema.orphanedRowAction
                         }
                     };